Versatility in the mode of coordination {(N), (N,O)−, (C,N)− or (C,N,O)2−} of [(η5-C5H5)Fe{(η5-C5H4)–CHN–(C6H4-2OH)}] to palladium(II)

Platinum(II) and palladium(II) complexes with (N,N′) and (C,N,N′)− ligands derived from pyrazole as anticancer and antimalarial agents: Synthesis, characterization and in vitro activities

“…The spectrum of 2c showed a singlet at −2165 ppm, the position of which is consistent with the values reported for related complexes with a "(N,N′)Cl 2 " environment around the platinum(II) [60][61][62]. For 2c the signal appeared at higher fields (δ=−3555 ppm); this trend agrees with those reported for complexes containing R\CH =N\(CH 2 ) n NMe 2 (R = phenyl or ferrocenyl moieties) as bidentate (N,N′) or terdentate (C,N,N′)…”

“…According to previous studies [59,60], these observations suggested the existence of a σ(M-C 2′ ) bond and the presence of five membered ring metallacycle in 4c and 5c.…”

Heterodi‐ (Fe, Pd/Pt) and Heterotrimetallic (Fe2, Pd) Complexes Derived from 4‐(Ferrocenylmethyl)‐N‐(2‐methoxyethyl)‐3,5‐­diphenylpyrazole as Potential Antitumoral Agents

“…Moreover, in one of the sets of resonances, the signals for 3a‐H and 4a‐H of the phenyl ring at the 3‐position of the pyrazole ring appeared high‐field shifted in relation to the signals of the free ligand and to those of 2 . This trend, also observed for the cyclopalladated compounds derived from V ,9a is typical of palladacycles containing bidentate [C(sp 2 , phenyl), N] – ligands 30,31. These findings suggested one of the units of 1 adopted this binding mode in 3 , whereas the other acted as a N donor.…”

Cyclopalladation of 3-methoxyimino-2-phenyl-3H-indoles

“…In addition, no evidences of any cross-peak between the resonance of the C 15 nuclei and those of the aromatic protons was detected in the [ 1 H-13 C]-HSQC spectra of any of the isomers. According to the literature [17], these findings suggested the existence of a r(Pd-C 15 ) bond in the complexes. In view of the results obtained from the characterization data available, we concluded that in 2a I and 2b I the ligands behaved as a bidentate [C(sp 2 , phenyl), N indole ] À group.…”